Molecular Formula
Trending Questions
Q.
What is Na2CO3 made up of?
1 molecule of Sodium Carbonate
2 atoms of sodium
1 atom of Carbon
3 atoms of Oxygen
Q.
Which of the following exists as molecules?
(i) Oxygen gas
(ii) Argon
(iii) Ammonia
(iv) Helium
(v) Water
(vi) Sugar
- i, iv, ii
- ii, iv, v
- iii, v, vi
- i, iii, v, vi
Q.
What will be the number of moles of oxygen in one litre of air containing 21% oxygen by volume under standard conditions?
0.003
0.006
0.009
0.012
Q.
Statement-1: N2 and H2O are both molecules.
Statement-2: A molecule can have only similar kind of atoms.
Both the statements are true, and 2 explains 1
- Only Statement-1 is true
Both the statements are true, and 2 doesn't explain 1
- Only Statement-2 is true
Q.
How many moles of hydrogen atoms are present in 1 mole of H2O?
3
2
1
4
Q. The chemical formula of ammonium nitrate is _________.
- NH4NO3
- NH4(NO3)2
- (NH4)2NO3
- NO3NH4
Q. A compound is formed when elements X and Y chemically combine with each other. X has a valency of 6 and Y has a valency of 4. The molecular formula of the compound will be _______.
- X2Y4
- X4Y2
- X2Y
- XY2
Q. Who proposed the law of constant proportions?
- John Dalton
- Ernest Rutherford
- Joseph Proust
- Antoine Lavoisier
Q. In a chemical reaction, the total mass of the reactants is 50 g. What will be the total mass of the products formed?
- 100 g
- 50 g
- 25 g
- 40 g
Q. Which among the following is the chemical formula of sodium chloride?
- NaCL
- NaCl
- Nacl
- naCl